等差数列{an}中,a2=5,a6=33,则a3+a5=______.
等差数列{an}中,a2=5,a6=33,则a3+a5 =a2+a6=5+33=38,
故答案为 38.
He plays tennis _____ a tennis racket _____ the tennis court. [ ]
A. use; in
B. with; on
C. use; on
D. with; in
分类索书号的主要作用是什么?